HIGH🇵🇱 Wersja polska

CVE-2021-42717

CVSS 7.5v3.1pub. 2021-12-07upd. 2025-07-03

ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  • Debian

    OS
    Debian
    10.011.09.0

  • F5 nginx Modsecurity Waf

    APP
    F5
    r24r25

  • Oracle HTTP Server

    APP
    Oracle
    12.2.1.3.012.2.1.4.0

  • Oracle Zfs Storage Appliance Kit

    APP
    Oracle
    8.8

  • Owasp Modsecurity

    APP
    Owasp
    3.0.0 – 3.0.6 (bez)

  • Trustwave Modsecurity

    APP
    Trustwave
    2.0.0 – 2.9.5 (bez)
🔵
CHECK WITH VENDOR
No clear patch data available. Check vendor references.
CWE
References

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